CN102959824A - Power supply device - Google Patents
Power supply device Download PDFInfo
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- CN102959824A CN102959824A CN2011800301569A CN201180030156A CN102959824A CN 102959824 A CN102959824 A CN 102959824A CN 2011800301569 A CN2011800301569 A CN 2011800301569A CN 201180030156 A CN201180030156 A CN 201180030156A CN 102959824 A CN102959824 A CN 102959824A
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- Prior art keywords
- battery pack
- battery
- circuit
- group
- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Protection Of Static Devices (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
[Problem] To simplify and improve the reliability of a battery protection circuit in a power supply device constructed by combining a plurality of modules. [Solution] A power supply device, which charges battery packs (20) with power supplied by an external power supply for charging (CP) and is capable of externally outputting the power stored in the battery packs (20), is provided with: abnormal pack output terminals (DA, DO, DI) for sending an abnormal pack signal to another battery pack (20) or a protection unit (2) when an abnormality occurs in a battery pack (20); protection-side input/output terminals (HI) for connecting the protection unit (2) to the abnormal pack output terminals (DA, DO, DI); and a protection circuit that is capable of interrupting the current from a battery pack (20). When an abnormality occurs in a battery pack (20), an abnormal pack signal is sent to the protection-side input/output terminals (HI) of the protection unit (2) from the abnormal pack output terminals (DA, DO, DI) of the battery pack (20), and when the protection unit (2) detects said abnormal pack signal, the protection unit (2) interrupts the current from the protection circuit.
Description
Technical field
The present invention relates generally to the supply unit that possesses the jumbo battery group that makes output voltage and output current both sides increase.
Background technology
Supply unit for output voltage and output current both sides are increased improves voltage by being connected in series a plurality of battery cells.A plurality of battery cells are made up with the module shape, thereby can tackle neatly different voltage, electric current etc.Developed before the present inventors and consisted of the supply unit (patent documentation 1) that has made the battery pack of cell module or blocking and then a plurality of these battery pack that can be connected in parallel.In this supply unit, built-in for the protection of battery cell so as not to be overcharged, the protective circuit of overdischarge etc.The monomer voltage that the charging and discharging currents that protective circuit for example detects the battery pack of flowing through has surpassed the threshold value of regulation or consisted of the battery cell of battery pack has surpassed the set upper limit threshold value or has been lower than lower threshold; thereby be judged to be unusual, and by making circuit breaker disconnection etc. with the protection battery pack.
Technical literature formerly
Patent documentation
Patent documentation 1: TOHKEMY 2006-149068 communique
Summary of the invention
The problem that invention will solve
But, make up in the situation of supply unit in the battery pack of a plurality of this modulars of combination since in each module built-in protective circuit, thereby so protective circuit repeat to cause waste, aspect cost, the aspect, space all seems redundant.In addition, because protective circuit brings into play function independently of one another, therefore in the situation that combination utilizes than multimode, the result of abnormality juding is conflicting or inconsistent sometimes, so the processing when having produced this different result of determination can become problem.
The present invention proposes in view of this problem of the prior art.The supply unit that main purpose of the present invention is to provide a kind of protective circuit high reliability ground that can make battery in the constructed supply unit of a plurality of modules of combination to move.
Be used for solving the technical scheme of problem and the effect of invention
To achieve these goals, the supply unit that the 1st aspect according to the present invention relates to possesses: more than one battery pack 20, its series connection and/or a plurality of secondary cell monomers 31 that have been connected in parallel; With protected location 2, it can be electrically connected with described battery pack 20, described supply unit utilization comes each battery pack 20 is charged from the electric power of the used for charging source CP supply of outside, can also export the electric power of accumulating in each battery pack 20 to outside, wherein, described battery pack 20 possesses battery pack 20 or the described protected location 2 unusual lead-out terminal DA of group that sends the group abnormal signal that is used for to other when unusual the generation; DO; DI, described protected location 2 possesses: protection side input and output terminal HI, it is used for and described group of unusual lead-out terminal DA; DO; DI connects; And protective circuit, it can cut off the electric current of described battery pack 20, has occured in described battery pack 20 when unusual, from the unusual lead-out terminal DA of group of described battery pack 20; DO; DI exports described group of abnormal signal to the protection side input and output terminal HI of described protected location 2, and described protected location 2 constitutes when detecting this group abnormal signal and cuts off electric current by described protective circuit.Thus, utilize protective circuit built-in in the protected location just can protect a plurality of battery pack, need not for each battery pack protective circuit to be set, can simplify formation.Have again; need not and deposit a plurality of protective circuits; and can be managed concentratedly uniformly by protected location, therefore can avoid conflict or error detection between a plurality of protective circuits, can be implemented in the control aspect also with battery protection more simple and that misoperation is few, the reliability and stability excellence.
In addition, according to the supply unit that the 2nd aspect relates to, can be so that described battery pack 20 be connected via the output line OL that shares with protected location 2, described protective circuit and described output line OL are connected in series.Thus, can utilize protective circuit that the electric current output from battery pack is stopped.
Have, according to the supply unit that the 3rd aspect relates to, described battery pack 20 can possess again: battery block 30, and it is connected in parallel a plurality of battery cells 31 and consists of; Battery monitor circuit 33, itself and each battery block 30 are connected in parallel, and detect the monomer voltage of each battery cell 31; Group control circuit 39, it is connected with described battery monitor circuit 33, and the output current of control battery block 30; With current insurance silk 32, itself and described battery block 30 are connected in series, and when being energized the electric current more than the setting, cut off electric current, the voltage that detects arbitrary battery cell 31 when described battery monitor circuit 33 is the monomer voltage threshold value of regulation when above, and described group of control circuit 39 is from organizing unusual lead-out terminal DA; DO; DI exports described group of abnormal signal.
In addition, the supply unit that relates to according to the 4th aspect, described battery pack 20 also can possess described the second battery monitor circuit 33B, described battery monitor circuit 33 cuts off electric current with the first monomer voltage threshold value, and described the second battery monitor circuit 33B constitutes to be higher than the second monomer voltage threshold value of described the first monomer voltage threshold value and cuts off electric current.Thus, can in battery pack, set a plurality of threshold values, realize dual protection.
In addition, the supply unit that relates to according to the 5th aspect can be so that a plurality of described battery pack 20 be connected in parallel with each other, and described protected location 2 is connected in parallel with described battery pack 20.
In addition, according to the supply unit that the 6th aspect relates to, described protective circuit can possess for the charge cutoff switch CSSW that cuts off charging current and be used for cutting off the discharge cut-out switch DSSW of discharging current.
In addition, according to the supply unit that the 7th aspect relates to, described protected location 2 also can possess charging mechanism, and this charging mechanism utilization comes described battery pack 20 is charged from the electric power of the used for charging source CP supply of outside.Thus, need not to arrange for each battery pack the charging mechanism of each battery pack, acquisition can be concentrated the advantage of carrying out by the charging mechanism of protected location.
In addition, according to the supply unit that the 8th aspect relates to, described battery pack 20 can not have charging mechanism.Thus, can omit charging mechanism from each battery pack, acquisition can be simplified the advantage of the formation of power-supply system.
In addition, the supply unit according to the 9th aspect relates to can be set as solar panel with described used for charging source CP.Thus, can make up the supply unit that the energy that utilizes solar panel to generate electricity and obtain charges to the secondary cell monomer.
In addition, according to the supply unit that the 10th aspect relates to, can utilize RS-485 to carry out the communication of 20 of described battery pack.
Description of drawings
Fig. 1 is the block diagram that the power-supply system of the supply unit that embodiment 1 relates to has been used in expression.
Fig. 2 is the block diagram of the battery pack (pack) of presentation graphs 1.
Fig. 3 is the block diagram that expression possesses the protected location of the charging circuit for subsequent use that variation relates to.
Fig. 4 is the block diagram of the battery pack that relates to of expression comparative example.
Fig. 5 is the block diagram of the example of the supply unit that relates to of expression variation.
Fig. 6 is that expression uses a plurality of battery pack to make up the block diagram of the example of supply unit.
Embodiment
Below, based on accompanying drawing embodiments of the present invention are described.Wherein, execution mode shown below only illustration be used for to specialize the supply unit of technological thought of the present invention, the present invention is defined as following content with supply unit.Especially, in this manual in order to understand easily claims, and with the numbering corresponding with the parts shown in the execution mode invest " claims one hurdle ", and technical scheme one hurdle of problem " be used for solve " shown in parts, but absolutely not the parts shown in claims are defined as the parts of execution mode.Especially, for the size of the component parts of putting down in writing in the execution mode, material, shape, its relatively configuration etc., as long as no determinate record, not with the meaning of circumscription of the present invention in this just, and only be simple illustrative examples.Moreover the size of the parts that respectively illustrate and position relationship etc. are sometimes exaggerative to some extent in order to offer some clarification on.And in the following description, same title, symbolic representation is same or the parts of homogeneity, and suitably description is omitted.Have again, for consisting of each key element of the present invention, come a plurality of key elements of dual-purpose thereby also can consist of a plurality of key elements by same parts with parts, can also be realized by the function that a plurality of parts are shared parts on the contrary.In addition, the content that illustrated in the embodiment of a part, execution mode also can be used for other embodiment, execution mode etc.
(embodiment 1)
The supply unit 100 that relates at embodiments of the invention shown in Fig. 1～Fig. 21.In these figure, Fig. 1 has represented to use the block diagram of the power-supply system of supply unit 100, and Fig. 2 is the block diagram of the battery pack 20 of presentation graphs 1.Power-supply system shown in these figure possesses supply unit 100, load LD, used for charging source CP and system controller 5.This supply unit 100 be recharged charge with power supply CP after, LD drives to load.Therefore, supply unit 100 possesses charge mode, discharge mode and the equalization pattern be used to making cell balancing described later.System controller 5 carries out data communication with supply unit 100, and master control is carried out in the action of integral body.
Moreover, in Fig. 2, only illustrate a battery pack 20, but can certainly be under with 20 series connection of a plurality of battery pack and/or the state that is connected in parallel and be connected (with reference to Fig. 3, Fig. 6) with protected location 2.
In charge mode, by battery pack connecting valve BPSW (CSSW, the DSSW that are equivalent to Fig. 2), the power supply connecting valve PSSW (CS that is equivalent to Fig. 2) of connection Fig. 1, thereby from used for charging source CP battery pack 20 is charged.On the other hand, in discharge mode, thereby power supply connecting valve PSSW is disconnected separate used for charging source CP or under the state that power supply connecting valve PSSW is connected, the electric power of battery pack 20 is supplied to load LD.The protection control circuit 3 of protected location 2 suitably switches charge mode and discharge mode by being connected with 8 communications of outlet side power converter or the I/O of load LD side.Particularly, if the residual capacity of battery pack 20 is below the lower threshold, then to switch to charge mode from discharge mode.In addition, if the residual capacity of battery pack 20 is more than the upper limit threshold, then stop charge mode, and switch to discharge mode.
Moreover though illustrate in Fig. 1, load LD is connected with used for charging source CP via discharge switch and charge switch and is connected with supply unit 100.Switched the on/off of these discharge switches and charge switch by the protection control circuit 3 of protected location 2.In addition, also can constitute the electric power of carrying out simultaneously as required load LD supply with, to the charging of supply unit 100.
(load LD)
The load LD that is driven by supply unit 100 is connected with supply unit 100 via outlet side power converter 8.Outlet side power converter 8 is to be converted to from the direct current power of battery pack 20 supplies the DC/AC transducer of alternating electromotive force.Moreover, in the situation that connects load that can DC driven, can certainly replace the DC/AC transducer and utilize the DC/DC transducer.
In addition, also can be as required the source power supply AC of outside be connected in load LD, in the situation of power shortage of battery pack 20 etc., switches to source power supply AC.In the example of Fig. 1, possess source power supply diverter switch AS, the electric power that detects battery pack 20 descends, thereby for example protects control circuit 3 that source power supply diverter switch AS is switched to source power supply AC side from battery pack 20 sides.As source power supply, can utilize the power supply of AC100V or 200V etc.
(used for charging source CP)
Used for charging source CP is connected with battery pack 20 via the power supply connecting valve PSSW (CS that is equivalent to Fig. 2) of protected location 2.Protection control circuit 3 is by switching to connection with power supply connecting valve PSSW, thereby by used for charging source CP battery pack 20 charged.In addition, when detecting battery pack 20 and be filled electricity, protection control circuit 3 switches to disconnection with power supply connecting valve PSSW.In the CP of used for charging source, can use solar panel, wind-driven generator, tital generator or geothermal power generating device etc. utilization the generating equipment of the natural energy generating equipment of natural energy or fuel cell, gas generating equipment etc.In the example of Fig. 1, used solar panel as generating equipment.In addition, except this generating equipment, in for subsequent use, also can add source power supply AC.Thus, in the situation of the power shortage that is obtained by generating equipment or Emergency time, can utilize source power supply AC to come battery pack 20 is charged.
Have, between used for charging source CP and supply unit 100, being provided with for the power converter that will supply with is the input side power converter 7 of electric power that is suitable for the charging of battery pack 20 again.In the example of Fig. 1, be connected the DC/DC transducer as between the solar panel of generating equipment and the supply unit 100.In addition, between source power supply AC and supply unit 100, connected and to have exchanged the AC/DC transducer that 100V is transformed to direct current.Can charge to battery pack 20 with suitable electric power by these input side power converters 7.Moreover, in order to reduce the loss that causes because of via voltage transformation of this input side power converter 7 etc., can certainly utilize the pulse current charge that has adopted switch element.
(block diagram of battery pack 20)
Next, the detailed content of battery pack 20 is described based on the block diagram of Fig. 2.As shown in the drawing, battery pack 20 possesses: with 31 series connection of a plurality of battery cells and be connected in parallel and the cell body that obtains, the current insurance silk 32, battery monitor circuit 33, group current detection circuit 37 and the group control circuit 39 that are connected in series with cell body.This group control circuit 39 is made of microcomputer (ASIC or PGA etc.).In addition, the driving electric power of group control circuit 39 carries out conversion by 38 pairs of electric power from cell body of adjuster and supplies with.Have again, as shown in Figure 3, can also append SCP (SelfControl Protector) 32P in battery pack 20, this SCP32P is by from the group abnormal signal of the second battery monitor circuit 33B described later and to the resistance energising and make it generate heat to fuse wire.Moreover, when utilizing SCP32P, consider the withstand voltage of element, wish to limit as shown in Figure 3 the series connection number of battery pack 20.
In addition, battery pack 20 is incorporated in the group housing.The group housing can use server with employed 19 inches housing in the back-up source etc.Thus, can utilize shelf (rack) that server uses etc., thereby can improve versatility.
(group control circuit 39)
In addition, in the example of Fig. 2, group input and output terminal DI and sub-side group splicing ear DO are connected with group control circuit 39 via isolator respectively.In addition, organizing unusual lead-out terminal DA is connected with group control circuit 39 via photoelectrical coupler etc.Thus, each signal terminal respectively with exterior insulation.Detailed content for each terminal is narrated in the back.
(group current detection circuit 37)
Group current detection circuit 37 detects the charging and discharging currents of battery pack 20, and sends to group control circuit 39.For example, come the test set electric current according to the both end voltage of the current sense resistor that is connected in series with battery pack 20.
(battery monitor circuit 33)
The temperature sensor 29 of battery monitor circuit 33 and the temperature that detects battery cell 31 or the voltage sensor that detects the cell block voltage of battery block 30 are connected.In temperature sensor 29, can utilize thermistor (Thermistor) etc.This battery monitor circuit 33 detects the overcharging of battery block 30, overdischarge based on the monomer voltage of the temperature of battery cell 31, battery cell 31 or piece voltage.When detecting when unusual, group control circuit 39 is from organizing unusual lead-out terminal DA output group abnormal signal.Receive this signal, protection control circuit 3 makes charge cutoff switch CSSW described later or discharge cut off switch DSSW disconnection, and the charging and discharging currents that cuts off battery pack 20.Moreover, in battery monitor circuit 33, can utilize protection IC etc.
(the second battery monitor circuit 33B)
Have, the battery pack 20 of Fig. 2 also possesses the second battery monitor circuit 33B except battery monitor circuit 33 again.In this embodiment, battery monitor circuit 33 cuts off electric current with the first monomer voltage threshold value (for example 4.15V/ monomer).On the other hand, the second battery monitor circuit 33B cuts off electric current with the second monomer voltage threshold value (for example 4.3V/ monomer) that is higher than the first monomer voltage threshold value.In addition, the second battery monitor circuit 33B not via the group control circuit 39 and directly via photoelectrical coupler from organizing unusual lead-out terminal DA output group abnormal signal.And, according to this group of abnormal signal, in protected location 2, do not make killer switch BRSW and/or charge cutoff switch CSSW be in dissengaged positions via protection control circuit 3.By possessing this dual defencive function, even if when the abnormality detection of group control circuit 39 can't work, also can realize the protection of battery cell, can further improve fail safe.Moreover, also can utilize protection IC etc. among the second battery monitor circuit 33B.
In addition, no matter in which kind of situation, when connecting a plurality of battery pack as described later, can come deploy switch according to the mode that the battery unit that unusual battery pack occured or comprised this battery pack is separated from supply unit.
(battery block 30)
(battery cell 31)
In addition, the positive electrode of preferred battery monomer 31 uses the ferric phosphate based material.Thus, can improve fail safe, the temperature dependency that can suppress to discharge and recharge also can be kept higher efficiency for charge-discharge especially when low temperature, even if therefore also can effectively discharge and recharge in the winter time.
Have, the positive pole of lithium rechargeable battery can adopt 3 compositions anodal again.The positive pole of this lithium rechargeable battery replaces existing cobalt acid lithium and uses Li-Ni-Mn-Co composite oxides and cobalt acid lithium to mix.The positive pole of this lithium rechargeable battery also uses the Ni-Mn-Co that is grouped into by 3 one-tenths except using lithium, thereby therefore can charge and thermal stability height, the maximum voltage that will charge are increased to 4.3V and have increased capacity with high voltage.
Wherein, in employed battery cell 31, the voltage when preferably charging is set as the voltage low voltage wittingly that is full of electricity than being judged as.For example, when using lithium rechargeable battery, be full of electricity although under general condition, near 4.2V, be judged as, be set as to be judged to be at 4V and be full of electricity.Thus, can realize the long lifetime of battery cell.
Have again, preferably select in the following manner: make the rated voltage (if lithium rechargeable battery then becomes about 3.7～4.0V/ monomer and multiply by the magnitude of voltage of connecting number and obtaining) as the nominal voltage of the battery pack (battery block) that is consisted of by battery cell 31 be lower than the maximum output action voltage V as the solar panel of used for charging source CP
OpFurther be preferably set to V
Op70～90%.This is because because the voltage of battery pack is subject to the impact of the operation voltage of solar panel, therefore departing from V
OpVoltage place charging power tail off.Have, compare with the depth of discharge of battery pack, the voltage of solar panel uprises.Therefore, in order to be full of electricity, preferably approaching when being full of electricity condition near V
OpIn addition, consider the voltage Yin Wendu of solar panel and change the group voltage that the needs selection is suitable.Therefore, be more preferably and be in above-mentioned voltage range.
(protected location 2)
Next, the detailed content of protected location 2 is described based on identical Fig. 2.This protected location 2 possesses protection side input and output terminal HI, the protective circuit that can cut off the electric current of battery pack 20, the charge switch CS that is connected for the unusual lead-out terminal DA of group, DO, DI.In charge mode, when by used for charging source CP battery pack 20 being charged, control charge switch CS.Be in when being full of electricity at battery cell 20, charge switch CS is controlled as disconnection.They carry out the control of on/off by the protection control circuit 3 of protected location 2.As shown in Figure 2, because charge switch CS is connected in series, therefore charge switch CS is in connection all the time in discharge mode.Charge switch CS is made of the thyristor of FET etc.Like this, will be arranged on the protected location side but not battery pack side, thereby can simplify the formation of battery pack side the charging mechanism of batteries charging, the discharge mechanism that battery pack is discharged.In the formation that connects a plurality of battery pack, the linking number of battery pack is more especially, and then the advantage of the simplification of sort circuit formation is also larger.Moreover controlled discharge switch is arranged on load LD side when driving load LD by battery pack 20 in discharge mode.The charging FET of protective circuit, discharge FET only are switched to disconnection when unusual, be maintained in addition connection when unusual.
(protective circuit)
In addition, protective circuit is to have occured to detect the switch that cuts off electric current when protection side input and output terminal HI from the unusual lead-out terminal DA of group, the DI of from battery pack 20 to protected location 2 has exported the group abnormal signal by protection control circuit 3 when unusual in battery pack 20.In this embodiment, will be in charge mode unusual the time discharge that is disconnected when the charge cutoff switch CSSW that is disconnected and unusual in discharge mode cut off switch DSSW and be connected in series.And, when group abnormal signal in each pattern is input to protection side input and output terminal HI, cuts off accordingly switch and be disconnected.This charge cutoff switch CSSW and discharge are cut off switch DSSW and also are made of the thyristor of FET etc.
Have again, in order further to improve the fail safe of protective circuit, also can killer switch BRSW be set at current path.Killer switch BRSW has the mechanism that has been disconnected when having inputted abnormal signal.As this killer switch BRSW, can utilize circuit brake STP20 series (series) (trade name) of Japanese サ one モ Co., Ltd. etc.
In addition, the second battery monitor circuit 33B constitutes not via group control circuit 39 directly via photoelectrical coupler from organizing unusual lead-out terminal DA output group abnormal signal.And, according to this group of abnormal signal, in protected location 2, via protection control circuit 3 killer switch BRSW and/or charge cutoff switch CSSW are not set as dissengaged positions.
(charging circuit 73 for subsequent use)
In addition, protected location also can have charging circuit for subsequent use as protective circuit.Fig. 3 illustrates this example.As shown in the drawing, protected location 2B configuring semiconductor switch etc., and possess charging circuit for subsequent use 73.This charging circuit for subsequent use 73 is maintained in the situation of the state below the overdischarge voltage at battery cell 31, replaces common charging and charges in mode for subsequent use according to the state that current value is descended.This charging circuit 73 for subsequent use possesses the charging for subsequent use controlled from the connection cut-off signal of port PCH be used to the resistance 75 that charging current is descended, according to the indication of protection control circuit 3 with switch 74.Can suitably utilize the thyristor of FET etc. in switch 74 in charging for subsequent use.In addition, in the example of Fig. 3,2 FET have been connected in series with switch 74 as charging for subsequent use.By this charging circuit for subsequent use 73; the cell voltage in when beginning charging be overdischarge voltage with inferior situation under; thereby protection control circuit 3 sends cut-off signal from port CH and makes charge cutoff switch CSSW be in off-state, makes as charging for subsequent use and is in on-state with the charge cutoff FET74CS of switch 74 thereby send connection signal from port PCH.By this action, when power supply CP supplying charging current was used in self-charging, charging current was reduced by resistance 75, battery cell 31 is charged with switch 74 via the charging for subsequent use of on-state.And; if (for example 90 minutes) become more than the setting (for example 3.0V/ monomer) with interior cell voltage at the appointed time from charging begins; then protect control circuit 3 to make charging for subsequent use be in off-state with switch 74; make charge switch CS be in on-state, thereby carry out common charging.In addition, if from charging begins at the appointed time (for example 90 minutes) be lower than setting (for example 3.0V/ monomer) with interior cell voltage, thereby then be judged to be battery cell 31 deteriorated can't charging normal, the output abnormality signal with stop the charging.The result of this abnormality juding suitably is sent to used for charging source CP side by communication process.In addition, this charging circuit for subsequent use 73 is not only when charging, when discharge, also can make discharge cut off switch DSSW and be in off-state, make the discharge cut-out FET74DS of charging circuit for subsequent use 73 be in on-state, thereby reduce impulse current to load by the discharging current that is reduced by resistance 75, perhaps suitable discharge is carried out in load.
In the example of Fig. 2,3 FET are connected in series in the output line OL of protected location 2 side.Like this, be arranged on the protected location side but not battery pack side by the protective circuit with unusual time protection battery cell, thereby can manage uniformly protective circuit concentratedly.So, except simplifying the battery pack, can also obtain following advantage: by the determination processing that the protected location by the battery pack outside makes protective circuit move uniformly, can avoid producing thus the risk of different decision.Namely, avoided the contradiction of the result of determination between a plurality of protective circuits or the misoperation that causes thus etc., aspect control, also can realize in more simple mode the battery protection of reliability and stability excellence.Especially, the battery pack number that connects more increases, and then this advantage is more obvious.In addition; the number of monomers that is connected in series is more; the electronic units such as semiconductor element that then utilize in the protective circuit more are required high-tension withstand voltage; but in the present embodiment; than the situation that protective circuit is arranged on each battery pack 20; as long as a protective circuit only is set, therefore can reduce the electronic unit that high voltage is withstand voltage that is required of high price, also be favourable aspect cost.
(comparative example)
In order to compare with above-described embodiment, the battery pack 920 that comparative example shown in Figure 4 relates to.Battery pack 920 shown in this figure possess respectively protection battery cell 31 so as not to be overcharged, the protective circuit 910 of overdischarge.Particularly, protective circuit 910 possesses charge cutoff FET913, FET912 is cut off in discharge.These FET912,913 on/off control are undertaken by fet driver (driver) 911.In addition, fet driver 911 is controlled by protection control circuit 915.Protection control circuit 915 is based on from the testing result for the set monomer control circuit 916 of each battery cell 31, and control FET912,913 on/off are with the protection battery cell.Each monomer control circuit 916 is collected respectively the battery cell 31 that is connected in parallel with each other (battery cell 31 also can connect according to the state that the suitable series and parallel of the battery cell is connected) battery monitor circuit 33 (battery monitor circuit 33 that is equivalent to embodiments of the invention) that monitors individually, the testing result of the second battery monitor circuit 33B (the second battery monitor circuit 33B that is equivalent to embodiments of the invention), and sends to protection control circuit 915.Have again, occured in arbitrary battery cell when unusual when protection control circuit 915 detects, cut off electric currents thereby FET912,913 is disconnected, and send abnormal signal to the system controller 5 of outside etc.
In the battery pack 920 of this formation, need in each battery pack, as protective circuit FET and drive circuit thereof be set, so so that circuit complicated.Especially, employed battery cell number or battery pack number are more, and be then all unfavorable aspect structure aspects, cost etc.Relative therewith; in the supply unit that the above embodiments relate to; thereby make the external sharing of having realized of protective circuit; in addition since with each battery pack between can be by communicating by letter to exchange abnormal signal based on RS-485 etc.; therefore can unify, the concentrated area manages; having simplified management and control, also is favourable aspect reliability.
Moreover, in the example of Fig. 2, although discharge switch DS is arranged on load LD side, charge switch CS is arranged on protected location 2 sides, be not limited to this formation.For example, can from protected location, omit charge switch, perhaps in battery pack side charge and discharge switch is set.As an example, the discharge switch DS that not only makes shown in Figure 5 is external but also make the example of the external supply unit of charge switch CS 200.In this embodiment, the control of charge switch CS and discharge switch DS is undertaken by system controller.Thus, obtain following advantage: can simplify formation and the control of protected location side, can manage uniformly in the system controller side discharging and recharging.Perhaps, also can charge switch be set in each battery pack 20 side.The control of the charging current of this moment is by carrying out in the on/off control of the set charge switch of each battery pack 20.Thus, can obtain the advantage that to charge to each battery pack 20 with different charging currents simultaneously.In addition, similarly, also can replace charge switch or on its basis discharge switch is arranged on each battery pack.Particularly, the control of discharging current is for preventing that overdischarge from being particularly important, because might be energized the above large electric current of charging current, and the therefore inhibition outbalance of discharging current for the protection of seeking battery cell.
(the connection examples of a plurality of battery pack 20)
In addition, in the example of Fig. 2, illustrated only a battery pack 20 to be connected in the example of protected location 2, but also a plurality of battery pack can have been connected or are connected in parallel.The a plurality of battery pack 20 of usefulness shown in Figure 6 make up the example of supply unit 300.In the figure, a plurality of battery pack 20 are one another in series to connect makes up battery unit 10, and then a plurality of battery units 10 are connected in parallel with each other.In the example of Fig. 6,3 battery pack 20 are connected in series to consist of battery unit 10, and then connect 2 battery units 10 and consist of battery module 1.Like this, it is modular that the battery pack that possesses a plurality of battery cells or battery block is become, thereby the battery pack of any number is connected and/or is connected in parallel, so can be adjusted to according to purposes etc. voltage, the electric current of hope.
Like this, can make up by connecting a plurality of battery pack the supply unit of maximization, capable of regulating linking number thus is so also can tackle easily for extensive purposes.In addition, even if in arbitrary battery cell, occured unusually to change thereby also can only isolate the battery pack that comprises unusual battery cell, obtained thus to reduce the advantage of the needed expense of battery altering.
(battery unit 10)
The battery unit 10 that connects a plurality of battery pack 20 and obtain makes arbitrary battery pack 20 as female group performance function, and other battery pack 20 is managed as subgroup and by mother's group.Female group monitors the state of subgroup, and protection control circuit 3 is reported.In the example of Fig. 6, female group is made of identical battery pack 20 with subgroup.That is no matter, make battery pack 20 sharings, be as female group performance function or as subgroup performance function according to type of attachment, all can cut down manufacturing cost.In the example of Fig. 6, will each battery unit 10 below the battery pack 20 that connects as female group, with other battery pack 20 as subgroup.
The battery pack 20 of Fig. 6 possesses signal terminal and power supply terminal.Battery pack 20 possesses group input and output terminal DI, group unusual lead-out terminal DA, sub-side group splicing ear DO as the signal terminal of organizing control circuit 39.Group input and output terminal DI is for the terminal of input and output from the signal of other Battery pack or protection control circuit 3, and sub-side group splicing ear DO is for to as other Battery packs of subgroup or the terminal of protection control circuit 3 input/output signals.In addition, organizing unusual lead-out terminal DA is for the terminal that unusually exports the outside to Battery pack.In the example of Fig. 6, organize unusual lead-out terminal DA and be connected with OR circuit 4.This group of input and output terminal DI, sub-side group splicing ear DO similarly also can be used as the unusual lead-out terminal performance function of group by communication with the unusual lead-out terminal DA of group.
On the other hand, as with 31 connected to one another groups of lead-out terminals of battery cell, battery pack 20 possesses positive terminal and negative terminal.Be connected with negative terminal at battery pack 20 chien shih positive terminals, battery pack 20 be one another in series connect to increase output voltage.
In addition, each battery unit 10 of Fig. 6 comprises 1 female group and a plurality of subgroup.Female group and subgroup connect into a string.At this, in order 20 of adjacent battery pack signal terminal to be connected to each other, and the sub-side group splicing ear DO of prime is connected with the group input and output terminal DI of secondary battery pack 20.In addition, the group input and output terminal DI of female group is connected with the output of protection control circuit 3.Have, which does not also connect and is in open circuit the side group splicing ear DO of the subgroup of afterbody again.In addition, in this daisy chain connected mode, in the end the sub-side group splicing ear DO of the subgroup of one-level connect terminal (terminal resistance) etc., expression is in the terminal connector of position, line terminal.
These groups input and output terminal DI, sub-side group splicing ear DO are the holding wires of two-wire, and protection control circuit 3 between carry out the exchange of signal by data communication.In data communication, can utilize and for example specify the packet communication that sends the destination.Each battery pack 20 is endowed intrinsic ID sequence number in advance, comprises the ID sequence number of the battery pack that sends the destination, the order corresponding with this battery pack in the packet that is grouped communication.Thus, can on the order wire that shares, carry out independent data communication for each battery pack.Moreover; as the method for each battery pack being given intrinsic ID sequence number, such as can suitably utilize according to the type of attachment of battery pack by the protection control circuit automatically distribute ID method, utilize double-row type switch (DIP switch) etc. to set individually the method etc. of ID sequence number with manual working for each battery pack.
By this connection, utilize the communication mode (for example utilizing the communication mode of master slave relation) of RS-485 etc., the female group of battery information (cell voltage, temperature, abnormal information etc.) that can grasp each subgroup.The signal of these various information etc. can communicate to protection control circuit 3 from mother's group by the communication mode of RS-485 etc.
In the example of Fig. 6, each battery unit 10 connects 1 female group and 4 subgroups (each unit only illustrate in the drawings 3 and omitted 2 diagram) on longitudinal direction, and connecting altogether, 5 battery pack 20 consists of 1 battery unit 10.The signal terminal connection each other that these battery pack are 20 is carried out via connector of loading and unloading type etc.Thus, can be so that the connection of battery pack 20, to change operation more easy, is favourable when safeguarding.
In addition, organize unusual lead-out terminal DA and be connected to OR circuit 4.OR circuit 4 arranges for each battery unit 10.Therefore, each OR circuit 4 is connected with 1 female group and 4 subgroups respectively in each battery unit 10.Each OR circuit 4 cuts off electric current as illustrated in the part of above-mentioned protective circuit from arbitrary battery pack 20 output stop signal (abnormal signal) time.As this unusual, comprise overcharge, overdischarge unusual etc.In addition, 3 receptions of protection control circuit unusually occur and carry out informing of battery replacing, urge the user to change the battery pack of the problem that produced.The user only changes corresponding battery pack, just can recover power-supply system.Thereby this formation can only be changed the battery pack of the problem that produced and lower repair cost, so and change operation and also finish to make by the loading and unloading of connector and change operation and simplify, the workability of maintenance also can be improved.
Moreover, exported to group control circuit 39 by the battery voltage value after the AD conversion etc. from battery monitor circuit 33.In each group control circuit 39, the judgement of carrying out overdischarge, overcharging etc. according to battery voltage value, if this overdischarge, overcharge etc. unusual, then organize the unusual information of passing on from subgroup to mother.In addition, the battery voltage value of each battery pack etc. is sent to female group as information from subgroup.
In each battery unit 10, if subgroup or female group are unusual, then the group control circuit 39 of female group communicates with protection control circuit 3.And, from protection control circuit 3 switch that is connected in parallel (not shown) that is arranged on output line OL is disconnected.In addition, the group control circuit 39 of female group obtains the battery voltage value of subgroup, female group, and the group control circuit 39 of female group adds up to, and its aggregate value is communicated to protection control circuit 3.
(protection control circuit 3)
The protection control circuit 3 of protected location 2 is connected with each battery unit 10 and OR circuit 4, and these parts are controlled.Supply unit 300 shown in Figure 6 be connected in parallel 2 battery unit 10A, 10B control to drive load LD by protection control circuit 3, and by used for charging source CP each battery unit 10 are charged.This protection control circuit 3 carries out the switching of the on/off of Switch according to discharge mode, charge mode as described above.Have, protection control circuit 3 receives abnormal signal from battery unit 10 as organizing 20 group input and output terminal DI from the signal of each battery unit 10 via mother again.This protection control circuit 3 can be made of microcomputer, MPU etc.
In the example of Fig. 6, the example that connects 2 battery units 10 has been described, but can certainly have connected the battery unit more than 3.In addition, in this example, control all battery units by the protection control circuit 3 of a protected location 2, control but in the more situation of battery unit number, also can constitute by a plurality of protected locations.Moreover in the example of Fig. 6, protection control circuit and battery unit are prepared respectively, but also can merge protected location in some battery units.The function that also can in the group control circuit 39 of the battery pack 20 that mother organizes, merge at this moment, the protection control circuit.
In addition, protection control circuit 3 possesses for the communication interface that communicates with system controller 5 external equipments such as grade.In the example of Fig. 6, the existing communication protocol according to UART, RS-232C, RS-485 etc. is connected with system controller 5 external equipments such as grade.In addition, also the user interface that the user operates power-supply system can be set as required.For example, in protected location, connect the input equipment of keyboard, mouse, touch panel, control desk etc. as operating portion, can stipulate maximum current flow or set to use the battery unit that connects.In addition, also can be arranged on display floater or the display lamp of informing to the user occured in the battery pack to be used for when unusual.
(OR circuit 4)
OR circuit 4 is connected with protection control circuit 3 via the bus that shares.Be connected with protection control circuit 3 for each battery unit 10 set OR circuit 4.As described later, protection control circuit 3 group control circuit 39 from mother's group in each battery unit 10 receives abnormal signal, informs the replacing of battery pack 20 to the user.Battery replacing except from export to system controller 5 grades such as the communication interface that is connected of protection control circuit 3; can also utilize the display that arranges at protection control circuit 3 or display lamp etc. to show battery replacing, and inform to the user by lighting of picture disply or display lamp etc.
Moreover, be not limited to the formation of the example of Fig. 6, for example also each can be organized the output of unusual lead-out terminal and directly send to protection control circuit side.
(the second equalization circuit 24)
Have, each battery pack 20 possesses the second series circuit of the second limiting resistance 25 and the second equalization switch 26 as the second equalization circuit 24 again.This second series circuit is connected in parallel with each battery pack 20 as shown in Figure 2, can eliminate each other inhomogeneous of battery pack 20 by the second equalization circuit 24.
(the equalization action of the second equalization circuit 24)
The group voltage of each 24 pairs of each battery pack 20 of the second equalization circuit carries out equalization and eliminates imbalance.The second equalization circuit 24 of Fig. 6 utilizes the high battery pack 20 of the second limiting resistance 25 pairs of groups voltage to discharge to eliminate imbalance.But, the present invention is not specific to the circuit that battery is discharged by limiting resistance with the equalization circuit.For example, thereby the equalization circuit also can make the high battery of voltage discharge to the electric storage means of capacitor or battery etc. electric storage means is carried out electric power storage, the electric charge of this electric storage means is discharged to the low battery of voltage, thereby eliminate the voltage difference of battery.
The second equalization circuit 24 of Fig. 6 possesses the second series circuit that the second limiting resistance 25 and the second equalization switch 26 are connected in series; protection control circuit 3 or described later group of control circuit 39 detect each group voltage; the second equalization switch 26 is controlled to be on/off, thereby in battery unit 10, carries out the equalization of battery pack 20.The second series circuit of the second limiting resistance 25 and the second equalization switch 26 is connected in parallel with each battery pack 20 respectively.This second equalization circuit 24 is when the group voltage of battery pack 20 uprises, by group control circuit 39 the second equalization switch 26 is switched to connection, thereby thereby by 25 pairs of battery pack 20 of the second limiting resistance discharge reduce battery pack 20 voltage to realize equalization.
The group control circuit 39 that possesses microcomputer compares the group voltage of each battery pack 20, and controls the second equalization switch 26 according to the mode of the group electric voltage equalization that makes all battery pack 20.This group control circuit 39 will with voltage be higher than regulation threshold voltage (group threshold value) thus the second equalization switch 26 of the second series circuit of being connected of battery pack 20 switch to and connect discharge.Battery pack 20 is voltage drop along with discharge.The second equalization switch 26 to other battery pack balance the time, is switched to disconnection from connection at the voltage drop of battery pack.When the second equalization switch 26 was in disconnection, the discharge of battery pack was stopped.Thus, group control circuit 39 discharges the battery pack with high group voltage, thereby makes the group balance of voltage of all battery pack.
(balance decision-making function)
Have, group control circuit 39 also can possess the balance decision-making function again.This group control circuit 39 utilizes the second above-mentioned equalization circuit 24 according to the mode of the electric voltage equalization of the battery pack that is connected in series 20 in each battery unit 10 is controlled.As above-mentioned, in each battery unit 10, obtain the voltage of each battery pack 20 as the group control circuit 39 of the battery pack 20 of mother group by communication, by relatively and make it discharge to keep balance.
(the 3rd equalization circuit 34)
Moreover each battery block 30 possesses for the 3rd inhomogeneous equalization circuit 34 of eliminating between battery block.The 3rd equalization circuit 34 is connected in parallel with each battery block respectively.That the 3rd equalization circuit 34 possesses is 30 that be connected in parallel with each battery block, the 3rd series circuit of the 3rd limiting resistance 35 and the 3rd equalization switch 36.The 3rd equalization switch 36 is controlled the on/off of these the 3rd equalization switch 36 by group control circuit 39.
(based on the equalization action of the 3rd equalization circuit 34)
Each the 3rd equalization circuit 34 makes the piece electric voltage equalization of each battery block 30 eliminate imbalance.The 3rd equalization circuit 34 of Fig. 2 utilizes the high battery block 30 of 35 pairs of piece voltages of the 3rd limiting resistance to discharge to eliminate imbalance.The 3rd equalization circuit 34 possesses that the 3rd limiting resistance 35 and the 3rd equalization switch 36 are connected in series and the 3rd series circuit that obtains, group control circuit 39 detects each piece voltage, the 3rd equalization switch 36 is controlled to be on/off, thereby in battery unit, carries out the equalization of battery block 30.The 3rd series circuit of the 3rd limiting resistance 35 and the 3rd equalization switch 36 is connected in parallel with each battery block 30 respectively.When the 3rd equalization circuit 34 is higher than the threshold voltage (block threshold value) of regulation at the piece voltage of arbitrary battery block 30, switch to connection by organizing the 3rd equalization switch 36 of control circuit 39 with this battery block 30.Thus, battery block 30 is discharged by the 3rd limiting resistance 35, thus the piece voltage drop.When dropping to the piece voltage of regulation, finish equalization, the 3rd equalization switch 36 is switched to disconnection from connection.Group control circuit 39 is the piece voltage of each battery block 30 relatively, and control the 3rd equalization switch 36 according to the mode of the piece electric voltage equalization that makes all battery blocks 30.
Like this, supply unit 300 is by the imbalance between the first equalization circuit for eliminating battery unit, by the imbalance between the battery pack in the second equalization circuit 24 each battery unit of elimination, and then pass through the imbalance that the 3rd equalization circuit 34 is eliminated 30 of the interior battery blocks of each battery pack.Like this, carry out equalization by the group that is divided into Three Estate, can in the supply unit that uses a plurality of battery cells, effectively eliminate imbalance thus, thereby can use steadily in the long term battery cell can improve reliability.Improving in the larger power supply unit of output with a plurality of battery cells especially, thereby might cause supply unit integral body to use because arbitrary battery cell can not use, therefore as far as possible stably using each battery cell particularly important.For this reason, do one's utmost to reduce the imbalance between battery cell and under the state of keeping the monomer balance, use, thereby can tackle this problem.
Although not shown among this figure, also can connect impulse current at supply unit outlet side shown in Figure 6 and prevent circuit.
Utilizability on the industry
The supply unit that the present invention relates to can suitably be used for the family expenses that utilize night electricity or solar panel to charge to use, the supply unit that factory uses etc.
Symbol description:
100,200,300... supply unit
1... battery module
2,2B... protected location
3... protection control circuit
4...OR circuit
5... system controller
7... input side power converter
8... outlet side power converter
10,10A, 10B... battery unit
20... battery pack
24... the second equalization circuit
25... the second limiting resistance
26... the second equalization switch
29... temperature sensor
30... battery block
31... battery cell
32... current insurance silk
32P...SCP
33... battery monitor circuit
33B... the second battery monitor circuit
34... the 3rd equalization circuit
35... the 3rd limiting resistance
36... the 3rd equalization switch
37... group current detection circuit
38... adjuster
39... group control circuit
73... charging circuit for subsequent use
74... charging switch for subsequent use
74CS... charge cutoff FET
74DS... FET is cut off in discharge
75... resistance
910... protective circuit
911...FET driver
912... charge cutoff FET
913... FET is cut off in discharge
915... protection control circuit
916... monomer control circuit
920... battery pack
BRSW... killer switch
BPSW... battery pack connecting valve; PSSW... power supply connecting valve
CSSW... charge cutoff switch; DSSW... switch is cut off in discharge
LD... load; CP... used for charging source
DS... discharge switch; CS... charge switch
OL... output line
DI... organize input and output terminal (organizing unusual lead-out terminal); DA... organize unusual lead-out terminal (organizing unusual lead-out terminal); DO... sub-side group splicing ear (organizing unusual lead-out terminal)
HI... protect the side input and output terminal
AC... source power supply; AS... source power supply diverter switch
Claims (10)
1. supply unit possesses:
More than one battery pack (20), its series connection and/or a plurality of secondary cell monomers (31) that have been connected in parallel; With
Protected location (2), it can be electrically connected with described battery pack (20),
The electric power that described supply unit utilization is supplied with from the used for charging source (CP) of outside comes each battery pack (20) is charged, and can also export the electric power of accumulating in each battery pack (20) to outside,
Described battery pack (20) possesses when unusual the generation sends the unusual lead-out terminal (DA of group that organizes abnormal signal for battery pack (20) or described protected location (2) to other; DO; DI),
Described protected location (2) possesses:
Protection side input and output terminal (HI), it is used for and described group of unusual lead-out terminal (DA; DO; DI) connect; With
Protective circuit, it can cut off the electric current of described battery pack (20),
In described battery pack (20), occured when unusual, from the unusual lead-out terminal (DA of group of described battery pack (20); DO; DI) export described group of abnormal signal to the protection side input and output terminal (HI) of described protected location (2),
Described protected location (2) constitutes when detecting this group abnormal signal and cuts off electric current by described protective circuit.
2. supply unit according to claim 1 is characterized in that,
Described battery pack (20) is connected via the output line (OL) that shares with protected location (2),
Described protective circuit and described output line (OL) are connected in series.
3. supply unit according to claim 1 and 2 is characterized in that,
Described battery pack (20) possesses:
Battery block (30), it is connected in parallel a plurality of battery cells (31) and consists of;
Battery monitor circuit (33), itself and each battery block (30) are connected in parallel, and detect the monomer voltage of each battery cell (31);
Group control circuit (39), it is connected with described battery monitor circuit (33), and the output current of control battery block (30); With
Current insurance silk (32), itself and described battery block (30) are connected in series, and cut off electric current when being energized the electric current more than the setting,
The voltage that detects arbitrary battery cell (31) when described battery monitor circuit (33) is the monomer voltage threshold value of regulation when above, and described group of control circuit (39) is from organizing unusual lead-out terminal (DA; DO; DI) described group of abnormal signal of output.
4. supply unit according to claim 3 is characterized in that,
Described battery pack (20) also possesses described the second battery monitor circuit (33B),
Described battery monitor circuit (33) cuts off electric current with the first monomer voltage threshold value,
Described the second battery monitor circuit (33B) constitutes to be higher than the second monomer voltage threshold value of described the first monomer voltage threshold value and cuts off electric current.
5. according to claim 1 to 4 each described supply units, it is characterized in that,
A plurality of described battery pack (20) are connected in parallel with each other,
And described protected location (2) is connected in parallel with described battery pack (20).
6. according to claim 1 to 5 each described supply units, it is characterized in that,
Described protective circuit possesses:
Charge cutoff switch (CSSW), it is used for cutting off charging current; With
Switch (DSSW) is cut off in discharge, and it is used for cutting off discharging current.
7. according to claim 1 to 6 each described supply units, it is characterized in that,
Described protected location (2) also possesses charging mechanism, and this charging mechanism utilizes the electric power of supplying with from the used for charging source (CP) of outside to come described battery pack (20) is charged.
8. according to claim 1 to 7 each described supply units, it is characterized in that,
Described battery pack (20) does not have charging mechanism.
9. according to claim 1 to 8 each described supply units, it is characterized in that,
Described used for charging source (CP) is solar panel.
10. according to claim 1 to 9 each described supply units, it is characterized in that,
Between described battery pack (20), utilize RS-485 to carry out data communication.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010190602A JP5611727B2 (en) | 2010-08-27 | 2010-08-27 | Power supply |
| JP2010-190602 | 2010-08-27 | ||
| PCT/JP2011/069205 WO2012026537A1 (en) | 2010-08-27 | 2011-08-25 | Power supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102959824A true CN102959824A (en) | 2013-03-06 |
| CN102959824B CN102959824B (en) | 2015-04-08 |
Family
ID=45723528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180030156.9A Expired - Fee Related CN102959824B (en) | 2010-08-27 | 2011-08-25 | Power supply device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9837811B2 (en) |
| EP (1) | EP2610993A1 (en) |
| JP (1) | JP5611727B2 (en) |
| CN (1) | CN102959824B (en) |
| WO (1) | WO2012026537A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2610993A1 (en) | 2013-07-03 |
| US9837811B2 (en) | 2017-12-05 |
| JP5611727B2 (en) | 2014-10-22 |
| WO2012026537A1 (en) | 2012-03-01 |
| US20130141828A1 (en) | 2013-06-06 |
| CN102959824B (en) | 2015-04-08 |
| JP2012050258A (en) | 2012-03-08 |
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